Insider KB5094980 Windows 11 Insider Experimental (26H1) build 28120.2242 - June 8



 Windows Insider Blog:

  • This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.
[Administrator protection]
  • After resuming the rollout of Administrator protection as enabled by IT admins, we are also now rolling out the ability to enable Administrator Protection in Settings under Privacy & security > Windows Security > Account protection and switching the toggle to on. A restart will be required. 



 Source:



Check Windows Updates



UUP Dump:

64-bit ISO download:

ARM64 ISO download:


 
Last edited:
This went from 28020.2207 to 28120.2242 and changed the insider page from Dev to this showing below.
It was a full reinstall and created Windows.old folder with 18.9 GB.

Edition Windows 11 Pro Insider Preview
Version 26H1
Installed on ‎6/‎8/‎2026
Evaluation expires on ‎8/‎11/‎2026 11:09 AM
OS build 28120.2242
Experience Windows Feature Experience Pack 1000.26100.361.0

1780972831324.webp
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Before Removing files:

1780973409269.webp

After the cleanup:
1780973693660.webp
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
There was still one package left and required DISM /ONLINE /CLEANUP-IMAGE /STARTCOMPONENTCLEANUP to get rid of it.

1780974141481.webp
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
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